Item Type: Delay Effect Pedal Material: Aluminum alloy shell Power Requirements: 9V DC center negative(not include) Current Consumption: 30mA Product Size: Approx. 11.2 x 6.4 x 3.4cm / 4.4 x 2.5 x 1.3in Package List 1 x Delay Effect Pedal 1 x Battery Cable 1 x Delay Effect Pedal Footpad Customers need to purchase an external power supply by yourself to be powered on 1With the delay effect pedal, you can easily and quickly dial in some large delay sounds right out of the box. It's an incredibly natural sound that makes the sound of the guitar shine 2The delay time is 600 milliseconds. When used in combination with Repeat, it can produce hitting effects or standard delays 3Adopts 9v battery or power supply, is a True Bypass design, and uses aluminum alloy shell like most pedals 4Built-in sturdy metal housing with sturdy knobs and blue LED, very beautiful and durable 5"LEVEL" knob set the level of the delayed signal, which is mixed with the direct sound of the guitar. "DELAY" knob control the delay time between 25ms and 600ms. "REPEAT" knob control the repetition of the delayed signal